| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have only been used [prep] [noun] | 7 |
|
| 2 | [verb] only been used [prep] [noun] | 7 |
|
| 3 | [vb -s] only been used [prep] [noun] | 5 |
|
| 4 | has only been used [prep] [noun] | 5 |
|
